What is the expected decibel loss associated with a perforation of the tympanic membrane?

The expected decibel loss associated with a perforation of the tympanic membrane typically falls within the range of 10-15 dB. This level of hearing loss is consistent with the disruption caused by a perforation, as it can lead to a reduction in sound transmission. The tympanic membrane, or eardrum, plays a crucial role in efficient sound conduction; when it is perforated, the direct transmission of sound waves is compromised, resulting in a measurable decrease in hearing acuity.

This range reflects how sound pressure is reduced as it travels through the air rather than through the intact and healthy tympanic membrane. In clinical settings, audiologists often use this information to assess the level of conductive hearing loss and tailor treatment plans for patients with tympanic membrane perforations.